165115085 has 4 divisors (see below), whose sum is σ = 198138108. Its totient is φ = 132092064.

The previous prime is 165115061. The next prime is 165115109. The reversal of 165115085 is 580511561.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (165115061) and next prime (165115109).

It can be written as a sum of positive squares in 2 ways, for example, as 115820644 + 49294441 = 10762^2 + 7021^2 .

It is a cyclic number.

It is not a de Polignac number, because 165115085 - 2¹² = 165110989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16511504 + ... + 16511513.

It is an arithmetic number, because the mean of its divisors is an integer number (49534527).

Almost surely, 2^165115085 is an apocalyptic number.

It is an amenable number.

165115085 is a deficient number, since it is larger than the sum of its proper divisors (33023023).

165115085 is an equidigital number, since it uses as much as digits as its factorization.

165115085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33023022.

The product of its (nonzero) digits is 6000, while the sum is 32.

The square root of 165115085 is about 12849.7114753601. The cubic root of 165115085 is about 548.6081445895.

The spelling of 165115085 in words is "one hundred sixty-five million, one hundred fifteen thousand, eighty-five".